France has 11x Denmark's population and 4x it's confirmed cases, so it seems like doing nothing worked better.
a) There's a time-lag of probably 1-2 weeks between someone becoming infected, until their case hits the official statistics.
b) There will be different rates of testing between different areas, healthcare systems, and countries, which will be hard to quantify.
c) There will be fundamental differences between countries (e.g. patterns of population density, quality/availability of healthcare, etc.) which mean that direct per capita comparisons (as you made) are of little value.
https://www.bloomberg.com/news/articles/2020-03-12/france-cl...